Can Aspirin Fight Breast Cancer?
Aspirin, already known as an effective way to reduce the risk of colon and rectal cancer as well as heart disease, may also be helpful in preventing breast cancer.Researchers revealed their positive findings of a 1-year study on the correlation between aspirin and other nonsteroidal anti-inflammatory (NSAID) drug use and breast cancer risk.
They monitored the progress of 1,442 female breast cancer patients and 1,420 females without the disease on Long Island, NY, between 1996 and 1997. The study population was predominantly white (93 percent of cancer patients and 91.8 percent of controls).
The findings: 20.9 percent of the cancer patients and 24.3 percent of the controls reported using aspirin or another NSAID at least once a week for 6 months or longer. Based on the progress of the patients, researchers found an overall inverse association of 0.8 between the use of aspirin and breast cancer risk in relation to nonusers. The women who benefited the most from aspirin use were those that took 7 or more tablets per week for less than 5 years, leading the researchers to believe that use of aspirin within 2 to 5 years of diagnosis is the critical period for an effect.
In addition to these findings, the compiled data suggests that aspirin use has added benefit for those with estrogen-receptor (ER) positive cancer--a cancer in which the increased presence of estrogen hormones allows the tumor to grow. Researchers believe frequent use of aspirin and NSAIDs prevent the synthesis of prostaglandins, which would reduce the amount of estrogen being created, thereby reducing the growth of ER-positive cancer.
Researchers also found a link between the reduction of breast cancer risk and the use of ibuprofen, but results were weaker than that of aspirin. Acetaminophen was found to have no effect on prostaglandin production.
The study concluded that the relationship between aspirin and ER-positive breast cancer would need to be further researched to see if these findings are supported in a larger, more racially and ethnically diverse population. Also, the potential benefits of aspirin use need to be balanced against potential harmful side effects such as peptic ulcer disease and gastrointestinal bleeding.

